# std::inplace_vector<T,N>::capacity

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< cpp‎ | container‎ | inplace vector

static constexpr size_type capacity() noexcept; |  | (since C++26)

Returns the capacity of the internal (inplace) storage. Equivalent to: return N;.

### Parameters

(none)

### Return value

The maximum number of elements the container is able to hold.

### Complexity

Constant.

### Notes

Because each std::inplace_vector<T, N> is a fixed-capacity container, the value returned by `capacity` equals `N` (which is also the value returned by max_size()).

### Example

Run this code

    #include <inplace_vector>

    int main()
    {
        constexpr std::inplace_vector<int, 4> v1;
        static_assert(v1.capacity() == 4 && v1.max_size() == 4);

        constexpr std::inplace_vector<int, 0> v2;
        static_assert(v2.capacity() == 0 && v2.max_size() == 0);
    }

### See also

max_size [static] | returns the maximum possible number of elements (public static member function)
size | returns the number of elements (public member function)
resize | changes the number of elements stored (public member function)
empty | checks whether the container is empty (public member function)
reserve [static] | reserves storage (public static member function)

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